Making a searchable database table

Using DT to make a searchable table

#### MAKING A SEARCHABLE TABLE FOR THE WEB ####

# First -- let's talk about: what is the Internet? What IS a web page?
# An oldie but a goodie from 2009: https://www.youtube.com/watch?v=7_LPdttKXPc
# Bottom line, it's just a bunch of computers connected to each other. 
# A website? It's just files on someone else's computer (aka server)

#We can use the "DT" package to easily make a sortable, filterable, searchable data table
#Just this little bit of code does a whole lot - check it out:

DT::datatable(events)

#We can already sort, but what if we want to allow the table to be FILTERED too?
#It's easy, we just add:
DT::datatable(events, 
              rownames = FALSE, 
              filter = "top"  # <--- NEW STUFF HERE
              )

#Now hmm, what's up with the filters on the text columns? Why aren't they working?
#It's because of a quirk in DT tables where filters will only work on text that is converted to a factor
#So let's do that
events <- events %>% 
  mutate(
    state = as_factor(state),
    event_type = as.factor(event_type)
  )

#Now let's try the DT table code again and see if it worked
DT::datatable(events, 
              rownames = FALSE, 
              filter = "top")

#Now, for the coup de gr?ce
#let's add some buttons at the top of the page to let people copy, download, etc
#we do that using a DT "extenstion" called, you guessed it, Buttons
# https://rstudio.github.io/DT/extensions.html

DT::datatable(events, 
              rownames = FALSE, 
              filter = "top", 
              extensions = 'Buttons', 
              options = list(   # <--- NEW STUFF STARTS HERE
                dom = 'Bfrtip',
                buttons = c('copy', 'pdf', "excel")
              )) %>%
  DT::formatStyle('cand_lastname',  color = '#a65ed6', fontWeight = 'bold')

## saving the result

# first we just need to assign our table to a variable...

mytable <- DT::datatable(events, 
                         rownames = FALSE, 
                         filter = "top", 
                         extensions = 'Buttons', 
                         options = list(
                           dom = 'Bfrtip',
                           buttons = c('copy', 'csv', "excel")
                         )) %>%
  DT::formatStyle('cand_lastname',  color = 'red', fontWeight = 'bold') 

# ... then just run this simple bit of code to export to html
DT::saveWidget(mytable, "candidatetracker.html")


# We've now created a working web page that can be put anywhere on the internet we choose
# Yay!

# If we stay within the world of quarto though we don't need to export it, we can just display it
# within the quarto page of course

What if we have a little table and want a super minimal table with everything stripped out

events %>% 
  head(5) %>% 
  DT::datatable(rownames = FALSE, 
                options = list(searching = FALSE, paging = FALSE, dom = "tip"))